Re: Java and Objective-C
Re: Java and Objective-C
- Subject: Re: Java and Objective-C
- From: Denis Bohm <email@hidden>
- Date: Sat, 7 Jun 2008 14:40:00 -0700
On Jun 7, 2008, at 2:08 PM, Bill Bumgarner wrote:
On Jun 7, 2008, at 1:54 PM, Denis Bohm wrote:
That is handled by the Java example above (via the "Object...
args"). A method with any number of arguments can be passed to
registerUndoWithTarget. So you could do something like:
undoManager.registerUndoWithTarget(this, "setFrame", true,
splineStruct);
So, Java *can* do dynamic dispatch, but cannot catch a method
dispatch automatically -- you effectively have to compose the method
invocation manually through a comparatively verbose API.
Thus we have a pattern related gem: If you are coming from Java to
Objective-C, the runtime's ability to easily capture, delay, and
redirect method invocations is a pattern you likely haven't used
before. And it is pervasive throughout the Cocoa frameworks --
Undo, Distributed Objects, Key/Value Observation, Bindings, etc...
all rely upon it.
By easily capture method invocations are you referring to overriding
methodSignatureForSelector and forwardInvocation?
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